Bearing box



Sept. 7, 1937' G. w. WALTON BEARING BOX Filed Sept- 21' 1934 Patented Sept. 7, 1937 lPATE-NT OFFICE BEARING Box George W.l Walton, Dallas, Tex. A Application September 21, `1934, Serial No. 744,914

, 1Q Claims.

This invention relates to new and useful improvements in bearing'boxes.

One object of the invention isl to provide an improved bearing box, which is particularly adapted to be mounted on'a walking beam or other swinging support.v

An important object of vthe invention is to provide an improved yieldable mounting for the pivoted member of a bearing box, whereby said Vmounting may yieldto compensate for angular deections of its pivoted member and its connections, thus providing a universal mounting for the said pivoted member.

An important object vof the invention is to provide a bearing box including a pivoted member for supporting a pitman or-the like 'and a mounting in'which saidmember is journaled, together with yieldable supports for the mounting,r whereby themounting may rock or-move in all directions and also undergo a torsional movement to permit said pivotal member and-its connections to readily swing and rock to compensate twisting and angular displacements.

Another object ofthe invention is to provide a mountingffor a. bearing pivot including yieldable supports held in frictional engagement with lthe mounting' to prevent free rotation therein,

\ butto permit a limited axial movement as well as a limited rocking movement of said mounting; also taking the end thrust thereof. 4` Still another object of the invention is to provide an improved bearing box including flexible man is provided; the flexible members being readily removable so as to be easilyy replaced I when worn, or for any,r other reason.

A-further object'of the invention is to provide yan improved 'bearing box including a pivotal member screw-threaded in its mounting and I capable of an oscillating` movement, and a lubricant reservoir through which the pivotal member passes, whereby oscillation of the member will effect efiicientvself-lubrication.

Still another object of the4 invention is to provide a bearing .box which will require lonly limitedlubrication and which will be self applied, as` wellas one which will be noiselessin v'operation vand also which will act as 4a, shock absorber.

A construction designed to `carry out the invention will be hereinafter described, together with other features of the invention. V

'Ihe invention will be more readily under- (Cl. 30S- 21) `stood from a reading of the following specification and Vby reference to the accompanying drawing', in which an example of the invention is shown, and wherein:

Figure 1 is an elevation of a bearing box constructed in accordance with the invention and mounted on a walking beam, l I

Figure 2 is an enlarged view of the box partly in elevation and partly in section,

Figure 3 is a view similar to Figure 2 and taken at right angles thereto, and

Figure 4 is a detail sectional view of one of the' yieldable supporting members.

In the drawing, the numeral I0 designates a walking beam which is mounted to swingen the usual jack post II. The beam is shown as comprising an I-shaped channel bar, and a pitman I2 is connected to` one end of the beam while a polishedrod (not shown) is connected to the opposite end. The other end of the pitman is connected with a rotating crank arm I3.

For `providing the connection between the upper end of the pitman and the walking beam I0, a bearing box I5 is mounted on said beam at one end thereof. It is to be understood that the in- 25 vention resides in the bearing box and its mounting on a walking beam and connection with a pitman is used merely to explain its use. The boxv includes a base I6 having outwardly 4extending anges Il at its front and rear (Figure 2). 'I'he flanges resten the top of the beam and cushion caps I8 are supported on the flanges at the `Vfront and rear of the base.

Each cap I8 has a ange I3 at its lower end and bolts 2Ilpass through this flange, through the ange I'I of the base, and through the top of the beam I0, and receive nuts 2| to securely `fasten `the-caps and base in position. The upper end of each lcap is provided .with an upwardly extending ear 22. An elongated bolt 23 passes through'the ears and receives a nut 2l -on its end. A spacer sleeve 23' surrounds the 1 bolt between the ears and acts to space the ears and caps apart. The caps are held in intimate contact with a boss I6 on the base by bolts I 9" passing therethrough.

Within each cushion cap, a yieldable cupshaped liner 25` is positioned. 'Ihe liner is preferably constructed of rubber compound, or other similar material, and may be encased in a thin metal casing 26, although the casing may be omitted. The liner is an' important feature of the invention and fits snugly within each cap I8. I A clearly,A shown in Figure 4, the casing is constructed of an outer portion which covers the outside of the liner and an inner portion which ts within the liner. A narrow annular space 2l is provided between the outer and inner portions of the casing, whereby the liner proper may be distorted and will yield without interference from the casing.

A gudgeon 28 is mounted between the caps I8 and has forwardly and rearwardly extending tapered trunnions 29which iit snugly within the liner casings 26 of thecaps. 4

By tightening the bolts I 9' and 23 the trunnions 29 are frictionally engaged in the casings 26 and while said trunnions and the gudg-eon are thus held against free rotation, the liners permit the gudgeon to undergo a torsional or rocking movement about its longitudinal axis. The liners also provide for rocking or swinging of the gudgeon in all planes of .its longitudinal axis, thus providing universal movement.

`Al Bearing 'bosses 30Vextend from opposite sides of the'center ofthe gudgeon atsubstantially right "angles't'o, the longitudinal axis of said gudgeons.

A transverse pivotal member or pintle 3l is screwthreaded through the bosses and has its'ends projecting therefrom. The upper ends of hanger bars 32 forming partof thel pitman l2, may be Awelded on the ends-of the pintle. The bosses and' pintle have sufcient kextension to space the bars from thesides of the beam I0. When the pitman Vreservoir 33 is formed 4within the gudgeon. 28 be- '.35A

this reservoir, and being screw-threaded', it will be tween the' bosses 30.' The pintlevpasses through seen that fas the pintle oseillates, its threads will `stated,`is securely clampedbetween the caps I8 in'the liners 25 and is incapable of free rotary movement therein. However, if any twisting deflection or unevenness of; 'operation occurs inthe pitman, the same'will becompensated by the universal movement' 'of the gudgeon 28 in the liners This yieldable mountingeliminates danger of breakage when unduestrain or twist isrplaced on the pitman or kits connection. The lliner; is readily removable from within'the caps and may leasily be replaced when worn. The metal casing around each liner provides a protecting surface which increases the life of saidr liner.

A bearing box" constructed in accordance' with thev invention will be adequately lubricated as well as substantially noiselessin operation. The yieldable Inc'iuntingvvillv not only compensate angular dsplacements'of the'gudgeon'28 andits connections, vbut will constitute a 'cushion and thus, a shock absorber. The liners or cushions k also take the end thrust ofthe gudgeom What I claim anddesire to secure vby Letters Patentis: 1

` '1. In a bearing box, asupport having opposite- 1y positioned bearing caps, yieldable liners within said caps, aogudgeon having trunnions engaged in the liners to undergo universal rocking and horizontal movement, means for frictionally holding the gudgeon against rotationv between the caps, and a pivotal member journaled inthe gudgeon at right anglesto the longitudinal axis of said gudgeon, said member having screw threads for conducting a lubricant therethrough. 2. In a bearing box, a support, yieldable liners in the support, a gudgeonhaving trunnions engaging in and frictionally held in the yieldable liners so that the gudgeon may undergo torsional as well as rocking and swinging movements, and a pivotal member journaled in the gudgeon and having screw threads for conducting a lubricant therethrough. v

3. A bearing box including, asupport having tapered recesses therein, a mounting having trunnions on its ends supported in said recesses, tapered cupped liners of rubber-like material inserted in said recesses and enveloping under compression the trunnions of said mounting, whereby the mounting is` capable of limited universal movement, and a member pivoted to said mounting at a right angle to the longitudinal axis of the trunnions, whereby said member may undergo universal movement.

4. A bearing boxy including, a support having recesses therein, a mounting having trunnions on v,its ends engaging in said recesses, yieldable liners Ainserted in said recesses and enveloping the trunnions of said mounting, vwhereby vthe mounting is capable of-.aI` rocking movement, a member pivoted to said mounting ata right angle to the longitudinal axis of the trunnions, whereby said member may undergo universal movement, and a threaded pintle., for pivoting said member to the mounting forconductinga lubricant therealong.

`5.1i. bearing box including, a support having vrecesses therein, a mounting having a central lubricant reservoir, trunnionson said mounting l engaging lin the recesses of said support, yieldable liners in said recesses and enveloping the trunnions, whereby the vmounting may undergo a rocking movementLa'threadedpintle extending centrally throughthe mounting atv right angles to the longitudinal-axis of the trunnions so as toV .pass through theY central lubricant reservoir for` conducting a lubricant therealong, and a member attached to the outer ends of said threaded pintle, whereby said member may undergo universal movement.

y6. A bearing box including,a`support,va mounting having its ends engaging in the support,

elastic liners within thev support and enveloping the endsA of said mounting to permit said mount-f V the ends of said mounting to 4permit said mount- Uing toundergo a rocking movement, a threaded vpintle extending through themounting at a right angle to. the longitudinal axis of'said engaging -ends for conducting a lubricant therealong, and

a member secured to thel ends of said pintle, whereby said member is journal'edv on the vmount- *ing and is capable ofuniversal movement.

8. In a bearing box of the-character described,

, a support,-yieldable hollow liner members com` posed of rubber-like material and inserted in axially opposed relation in the support, a mounting having raxially opposed trunnions tted in said liner membersmeans forcompressing said liner members surroundinglyabout the trunnions whereby to hold the mounting with limited universal movement therein, and a transverse pivotal member journaled in the mounting.

9. In a bearing box of the character described. a support, opposed hollow cap members which are adjustable with relation to each other on said support, yieldable liners of flexible and resillent material in said cap members, a gudgeon having opposed trunnions fitted andfrictionally held in said liners, means for holding said cap members in adjusted relation to compress said liners surroundingly about said trunnions, and a transverse pivotal member journaled in the gudgeon. i

GEORGE W. WALTON. 

